There’s a spot over Lake Superior where migrating butterflies veer sharply. No one understood why they made such a quick turn at that specific place until a geologist finally made the connection: a mountain rose out of the water in that exact location thousands of years ago. These butterflies and their offspring can still remember a mass they’ve never seen, sound waves breaking just so, and fly out of the way. How did they pass on this knowledge of the invisible? Does this message transmit through the song they sing to themselves on their first wild nights, spinning inside a chrysalis? Or in
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